I am noticing that SASS module is very buggy and wants exact spacing

Currently completing the sass module and noticed that code doesn’t pass because there is a space between the variable and the property like so.

This will pass

But this will not pass?
border-radius: $radius

I tested the code below in a SASS processor (https://www.sassmeister.com/) and the spaces are fine to have before the variable name.

@mixin border-radius($radius){
    -moz-border-radius: $radius;
    border-radius: $radius;  

.test {
    @include border-radius(4px);

Has anyone else noticed this?

Can any forum moderator mark this as solved or delete? I think this was because of a connection error. Thanks!